Make modlen prefix big-endian

1 files changed, 3 insertions, 3 deletions

diff --git a/rsa.cpp b/rsa.cpp
index 94c9782..34b47f9 100644
--- a/rsa.cpp
+++ b/rsa.cpp
@@ -48,15 +48,15 @@ namespace RSA{
 	string exportKey(const Key &key){
 		string modser=key.mod.serialiseMantissa();
 		int32_t modlen=modser.size();
-		string modlenstr{(char)(modlen&0xff),(char)((modlen>>8)&0xff),(char)((modlen>>16)&0xff),(char)((modlen>>24)&0xff)};
+		string modlenstr{(char)((modlen>>24)&0xff),(char)((modlen>>16)&0xff),(char)((modlen>>8)&0xff),(char)(modlen&0xff)};
 		return Base64::encode(modlenstr + modser + key.exp.serialiseMantissa());
 	}
 
 	Key importKey(const string &repr){
 		string deser=Base64::decode(repr);
 		if(deser.size()<=4)throw invalid_argument("Invalid key string length");
-		int modlen=(uint8_t)deser[0]+((uint8_t)deser[1]<<8)+
-		           ((uint8_t)deser[2]<<16)+((uint8_t)deser[3]<<24);
+		int modlen=((uint8_t)deser[0]<<24)+((uint8_t)deser[1]<<16)+
+		           ((uint8_t)deser[2]<<8)+(uint8_t)deser[3];
 		if((int)deser.size()-4-modlen<=0)throw invalid_argument("Key string incomplete");
 		Key key;
 		key.mod.deserialiseMantissa(string(deser.begin()+4,deser.begin()+(4+modlen)));